The Q&A Archives: worms eating hydrangea leaves

Question: I was given an endless summer hydrangea from Monrovia. It is blooming but the leaves are
being eaten by worms they are all turning brown curling and dying. What can I do about this problem?

Answer: Based on your description I am not certain what is eating your hydrangea's leaves but it might be a pest called the leaf tier. Spraying with Bt (Bacillis thuringiensis) should stop them. Cover all surfaces of the leaves with the spray. The Bt will take a day or two to show results (the worms have to eat it, then they die) so you may also want to do some handpicking to remove them. Good luck with your hydrangea.

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